Degree measure Whiteboard exercise Play

Degrees – activity Whiteboard exercise Play

Degrees, minutes and seconds Whiteboard exercise Play

Demonstration or proof? Animation Play

Demonstration or proof? Student activity Play

Derivation of the formula Animation Play

Detecting outliers Student activity Play

Determining angles Whiteboard exercise Play

Determining angles Whiteboard exercise Play

Determining the sign of the tangent Whiteboard exercise Play

Determining the signs of trigonometric functions Student activity Play

Different angles Student activity Play

Diffraction of electrons Whiteboard exercise Play

Diffraction of electrons – the Davisson-Germer experiment Student activity Play

Diffraction of X-rays Whiteboard exercise Play

Diffraction of X-rays Student activity Play

Diffraction of X-rays Simulation Play

Diffuse reflection Student activity Play

Diffuse reflection Simulation Play

Distance – a more difficult problem Student activity Play

Distance – a more difficult problem Whiteboard exercise Play

Dividing natural numbers Student activity Play

Divisibility by 11 Student activity Play

Division algorithm Student activity Play

Does the triangle exist? Whiteboard exercise Play